Method and apparatus for multiplexed time aligned analog input sampling

摘要

A sensor system includes a first sensor and a second sensor and a multiplexor having at least two multiplexer inputs connected to the sensors. The output of the multiplexor is connected to a time correlation logic circuit via at least a signal conditioning and anti-aliasing filter, and the output of the time correlation logic is a time correlated sensor reading of the first and second sensor.

主权项

1. A sensor system comprising:
a first sensor and a second sensor; a multiplexor having at least two multiplexer inputs, wherein a first multiplexer input is connected to an output of said first sensor and said second multiplexer input is connected to an output of said second sensor; an output of said multiplexor is connected to a time correlation logic circuit via at least a signal conditioning and anti-aliasing filter, the time correlation logic circuit including logic circuitry operable to cause said time correlation logic circuit to perform the steps of determining a currently passed value of the multiplexed signal at time t, the currently passed value being an instantaneous value of one of the first sensor and the second sensor, determining an average value representative of a non-currently passed value of the multiplexed signal at time t, the average value of a non-currently passed value being an average output of the other of said first and second sensor, combining said currently passed value and said average value representative of said non-currently passed value at time t, thereby determining a time correlated sensor value at time t, and wherein the time correlated sensor value is an instantaneous value of one of the first sensor and the second sensor at time t and an average value of the other of the first sensor and the second sensor at time t; wherein an output of said time correlation logic circuit is connected to an input of a signal processor; and wherein said output of said time correlation logic is the time correlated sensor value.